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Boltrunner

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Jul 25, 2016
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Location
Odin mn
First Name
Shane
Truck Year
1987
Truck Model
V20
Engine Size
5.7
Im sitting here stuck at a rest area near home. I filled up about 20 miles ago and am empty again. I just put some fuel in and after i moved kept the truck idling. I watched the fuel start dripping out of my passenger side tank. I dont use that tank because i haven't replaced it yet. Any ideas?
 

K201979

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Location
Winona, missouri
First Name
Hippie
Truck Year
1979
Truck Model
K20
Engine Size
350ci
I dont know anything about the selector valve, but id try to find out how to bypass it. Sorry im not more help
 

75Monza

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Location
Colville, Washington
First Name
Jeremy
Truck Year
1980, 1982, 1985
Truck Model
K30, K20, K20
Engine Size
454, 383, 350
On my 86, selector valve is up tight right about the back of the cab off passenger side frame rail, not exactly easy to get anything off it. If you have one good tank and a bad tank leaking your fuel out, switch is stuck in the middle or something...junk most likely. If you can get the bolts out and drop the switch, need to identify the hose going to the engine and the hose from your good tank and connect together with a barbed nipple or an old piece of metal fuel line and hose clamps so you are just using the one tank and bad tank is out of the picture.
 

Boltrunner

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Jul 25, 2016
Posts
365
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Location
Odin mn
First Name
Shane
Truck Year
1987
Truck Model
V20
Engine Size
5.7
Sounds good. Truck is on a trailer now headed to the shop where i have a skidder available to pull the bed and get a bettee look at it all. Odd thing is though is that it sounds like the good tank is priming into itself. Almost like something caused enough pressure to pop the pump off the sending unit.
 

Boltrunner

Full Access Member
Joined
Jul 25, 2016
Posts
365
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Location
Odin mn
First Name
Shane
Truck Year
1987
Truck Model
V20
Engine Size
5.7
The feed line is 3/8 correct?
 

75Monza

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May 5, 2017
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Location
Colville, Washington
First Name
Jeremy
Truck Year
1980, 1982, 1985
Truck Model
K30, K20, K20
Engine Size
454, 383, 350
Oh crap, forgot the 87 has in tank electric pump. Might be the short little rubber hose on the pump outlet, ethanol does wonders to old rubber fuel line.
 
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Boltrunner

Full Access Member
Joined
Jul 25, 2016
Posts
365
Reaction score
181
Location
Odin mn
First Name
Shane
Truck Year
1987
Truck Model
V20
Engine Size
5.7
I just bypassed the tank switch for now. New tanks are comming this summer anyway.
 

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